<!-- eslint-disable vue/multi-word-component-names -->
<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary">
            添加角色
          </el-button>
        </el-col>
      </el-row>
      <!-- 角色列表数据区 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
              :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级、三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                  :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable @close="removeRightById(scope.row, item2.id)" type="success">{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag closable @close="removeRightById(scope.row, item3.id)" type="warning"
                      v-for="(item3) in item2.children" :key="item3.id">
                      {{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- 将数据进行整理 -->
            <!-- <pre>
            {{ scope.row }}
            </pre> -->
          </template>
        </el-table-column>
        <el-table-column type="index" label="#">
        </el-table-column>
        <el-table-column prop="roleName" label="角色名称">
        </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述">
        </el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- eslint-disable-next-line -->
          <template slot-scope="scope">
            <!-- {{ scope.row }} -->
            <!-- 编辑按钮 -->
            <el-button size="mini" @click="showEditDialog(scope.row.id)" type="primary" icon="el-icon-edit">编辑
            </el-button>
            <!-- 删除按钮 -->
            <el-button size="mini" @click="removeUserById(scope.row.id)" type="danger" icon="el-icon-delete">删除
            </el-button>
            <!-- 分配权限 -->
            <el-tooltip :enterable="false" effect="dark" content="分配权限" placement="top">
              <el-button @click="showSetRightDialog(scope.row)" size="mini" type="warning" icon="el-icon-setting">
                分配权限
              </el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" @close="setRightDialogClosed" :visible.sync="setRightDialogVisible" width="50%">
      <!-- 树形控件 -->
      <el-tree ref="treeRef" :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<!-- 行为区 -->
<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的id值数组
      defKeys: [],
      // 当前即将 分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('/roles')
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.roleList = res.data
      // console.log(this.roleList)
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList() 这样会使页面重新渲染
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      // console.log(this.rightslist)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色下所有三级权限的id并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node不包含children属性则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr)
      )
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配角色
    async allotRights () {
      const keys = [
        // ...展开运算符
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.getRolesList()
      // console.log(res)
      this.setRightDialogVisible = false
    }
  }

}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
